Obstructed defecation is a common, disabling condition, with significant crossover to other functional gastrointestinal disorders as well as pelvic floor problems. It requires a comprehensive assessment as it involves functional, behavioural, psychological and anatomical aspects. This chapter will address the broad aspects of obstructed defecation including an in-depth discussion of concepts of normal and abnormal defecation, pathophysiology, and appropriate use of investigations. A summary of nonoperative therapies including biofeedback and irrigation will feature, along with an update on the evidence for surgical options in obstructed defecation.